# HA + Google Home setup — POS Briefing button

The MQTT bridge (`pos-briefing-mqtt.service` on steel141) auto-creates an HA
button via MQTT discovery. Google's `google_assistant` integration does not
support `button` entities, so we wrap the button in a `script` (scripts expose to
Google as a **Scene** = a tappable button in the Home app).

Chain: **Google Home tap → HA script → `button.press` → MQTT `posbriefing/button/press`
→ bridge runs `pos_briefing.py` → prints on the TM-m30.**

## 0. Confirm the entity exists
Settings → Devices & Services → **MQTT** → device **POS Briefing**. You should see
button **Print Daily Briefing** (entity `button.print_daily_briefing`). Pressing it
in HA should print a receipt. (Status is published on `posbriefing/status`:
`idle`/`printing`/`ok`/`error:<msg>`; availability on `posbriefing/availability`.)

If the entity id differs, use whatever HA shows in the script below.

## 1. Add the script
Settings → Automations & Scenes → **Scripts** → (top-right) Edit in YAML, or paste
into `scripts.yaml`:
```yaml
print_daily_briefing:
  alias: Print Daily Briefing
  sequence:
    - service: button.press
      target:
        entity_id: button.print_daily_briefing
  mode: single
```

## 2. Expose the script to Google
Add to the SAME `google_assistant:` block that already exposes the LG TV switch
(keep your existing `project_id` / `service_account` lines):
```yaml
google_assistant:
  project_id: <your existing project_id>
  service_account: !include <your existing service_account file>
  report_state: true
  exposed_domains:
    - switch
  entity_config:
    script.print_daily_briefing:
      name: Print Daily Briefing
      expose: true
```
Reload (Developer Tools → YAML → "Google Assistant" or restart HA).

Reminders from the lgtv 2026-06-06 linking (already satisfied for your setup):
manual `google_assistant` integration (not Nabu Casa); account-linking scopes must
include `email` + `name`; the **"HTTP basic auth header" checkbox must be OFF**; the
Google **Test** must be activated by the same account used in the Home app
(slingshooter08). The GCP OAuth consent screen is unrelated to smart-home linking —
don't touch it.

## 3. Sync to Google Home
Say "Hey Google, sync my devices" (or re-run device setup in the Home app). The
button appears as **Print Daily Briefing**; tapping it prints the receipt.

## Optional: surface print status in HA
Add an MQTT sensor (configuration.yaml) if you want to see the last result:
```yaml
mqtt:
  sensor:
    - name: "POS Briefing Status"
      state_topic: "posbriefing/status"
      availability_topic: "posbriefing/availability"
```

## Notes
- A print takes ~1–2 min (gemma4:26b summarization). The button returns immediately;
  watch `posbriefing/status` go `printing` → `ok`.
- A second press while one is in flight is ignored (debounced) — no double prints.